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What is the heat released when 25 grams of sodium hydroxide (NaOH) crystallizes out of a solution at its freezing point, given the enthalpy of fusion of NaOH is -44.51 kJ/mol? (Molar mass of NaOH = 40.00 g/mol)

asked Feb 13 in ThermoChemistry by VetaPetterd1 (2.3k points)

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What is the enthalpy change when 10.0 g of sodium hydroxide dissolves in 200 mL of water at 25°C? The molar enthalpy of dissolution of sodium hydroxide is -44.5 kJ/mol.

asked Feb 13 in ThermoChemistry by MarciaBrooke (2.6k points)

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How many kJ of heat are released when 2.5 g of octane undergo complete combustion according to the reaction:$$C_8H_{18} + 12.5 O_2 \rightarrow 8 CO_2 + 9 H_2O$$Given: Enthalpy of combustion of octane = -5,470 kJ/mol.

asked Feb 13 in ThermoChemistry by SherrillDail (2.3k points)

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What is the amount of heat released when 5 grams of NaCl is crystallized from its aqueous solution at 25°C, and the final temperature of the solution is -5°C? (Given: Heat of crystallization of NaCl = -3.92 kJ/mol)

asked Feb 13 in ThermoChemistry by TawannaPigot (2.3k points)

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What is the heat of hydration of magnesium sulfate, MgSO4, when 45 grams of the anhydrous salt is dissolved in 250 mL of water? The molar heat of hydration of MgSO4 is -138.5 kJ/mol.

asked Feb 13 in ThermoChemistry by Latonya89F54 (2.3k points)

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What mass of CO2 will be produced when 12.5 grams of methane (CH4) reacts with 50.0 grams of oxygen (O2) according to the following balanced equation:CH4 + 2O2 → CO2 + 2H2O Identify the limiting reactant and calculate the mass of CO2 produced.

asked Feb 13 in Chemical reactions by JaysonMcKenn (2.1k points)

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How does the presence of fine particulate matter in the air contribute to the development of respiratory illnesses such as asthma and bronchitis in humans, and what chemical properties of these particles make them harmful to human health?

asked Feb 13 in Environmental Chemistry by JaredOliva6 (2.4k points)

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What is the effect of fiber orientation on the mechanical properties of carbon fiber-reinforced polymer composites used in the aerospace industry?

asked Feb 13 in Polymer Chemistry by CecileODrisc (2.4k points)

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What is the predicted reactivity of the transition metal compound Fe2O3, based on its electronic configuration?

asked Feb 13 in Inorganic Chemistry by TVMBeulah703 (2.7k points)

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What is the magnetic moment of Fe(CO)₅ in the gas phase? Calculate the magnetic moment and identify its configuration.

asked Feb 13 in Inorganic Chemistry by ChristianeBo (2.1k points)

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What is the electronic structure and bond order of the Fe(CO)5 molecule, and how does it relate to its observed vibrational modes and infrared spectrum?

asked Feb 13 in Computational Chemistry by OctavioCarva (2.3k points)

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What is the process of fatty acid oxidation, and how is it relevant to lipid signaling and metabolism in human cells?

asked Feb 13 in BioChemistry by AlisiaBarwel (2.1k points)

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How does the rate of fatty acid oxidation change in a cell when the concentration of coenzyme A decreases?

asked Feb 13 in BioChemistry by CasimiraMick (2.5k points)

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What methods and equipment can be used for the extrusion of a specific polymer, and how can the extrusion conditions be optimized to achieve the desired properties of the final product?

asked Feb 13 in Polymer Chemistry by JereGerald1 (2.6k points)

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1 answer 7 views

How does the exposure to pesticide residues in fruits and vegetables affect the concentration of organophosphate metabolites in children's urine samples?

asked Feb 13 in Environmental Chemistry by Jeramy48117 (2.4k points)

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How does exposure to particulate matter in polluted air affect human respiratory health in terms of lung function and risk of respiratory diseases such as asthma and lung cancer?

asked Feb 13 in Environmental Chemistry by LenoreCheval (2.6k points)

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What are the potential health effects of exposure to particulate matter in polluted air and how can these be minimized through chemistry-based strategies?

asked Feb 13 in Environmental Chemistry by RaleighAckle (2.0k points)

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How does exposure to nitrogen oxides and sulfur dioxide in polluted air affect respiratory health in humans?

asked Feb 13 in Environmental Chemistry by KWFErin73234 (2.2k points)

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How does exposure to high levels of nitrogen oxides in air pollution affect respiratory function and increase the risk of respiratory diseases in humans?

asked Feb 13 in Environmental Chemistry by BenjaminWenz (2.4k points)

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How does exposure to different air pollutants, such as nitrogen oxides or ozone, affect the respiratory system of humans? Identify and explain the mechanisms of these pollutants' effects on our health.

asked Feb 13 in Environmental Chemistry by AdaBethel250 (2.5k points)

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